Rotary pump.



' No. 806,651. y y, PATBNTBD 1350.5,190'51 0.0.FARRAR- ROTARY PUMP.

APPLIATION FILED MAY 8, 1903.

3 SHEETS--SHEET l.

@plums No.806,65`|1. i v PATBNTED DBG. 5, 1905.v

G. O. FARRAR.4 I

ROTARY PUMP.

APPLICATION FILED MAY s, 1903.

3 SHEETS-SHEET 2. l

{WI/f n No. 806,651. Y v vAPATBNTED DEG.l 5, l1905.

0.0.FARRAR- ROTARY PUMP. APPLICATION FILED MAY 8, 1903.

3 SHEETS-SHEET 3.

SWF/77am h, W .Mw

, uNiTEE STATES PATENTn CEEICE.

, CHARLES o. EARRAR, oE SoMERvILLE, MASSACHUSETTS, AssieNoR or ONE-HALE To THOMASM. BELKNAR oE NEW YORK, N. Y.

ROTARY'IT-"UNIP-` To all whom 1f/'may concern:

Be it known that I, CHARLES O. FARRAR, a citizen of the United States, and a resident of Somerville, county of Middlesex, State of Massachusetts,have invented an Improvement lin Rotary Pumps, of which the following de- `single shaft operate merely to displace the material beingpumped, but are not constructed to forceV the 4material forward against a high pressure. lt is the object of this invention to provide a novel rotary pump of this class which shall have the capacity of positively forcing the materialforward regardless of the pressures against which it is pumping and which, therefore, is adapted for use asa high-duty pump.

or pockets which are connected by ports and means wherebyz the material Lin the first pocket is forced positively into the next succeeding pocket and locked in said pocket by the closing of the inlet-port to the pocket.l Thereafter this charge of material is positively forced forward into another pocket and locked therein, this operation being continued until the charge is finally delivered tothe outlet from the pump.

The pump as constructed ,comprises a casing provided with a cylindrical bore in which operate the pumping Velements which `form .between them the lcompartments. or pockets above referred to. rlhe movable members of the pumping elements are in alinement and are mounted on the same shaft. "In the form of my invention herein shown the pumping'v elements comprisea pluralityof what I have termed inclined disks,.v7 which arearranged successively in said bore, and transverse and longitudinal partitions interposed between the inclined disks and dividing the space between said disks into the compartments or pockets above mentioned, the parts being so arranged that there is one transverse and at least one longitudinal partition between each two adjacent inclined disks. Each of said partitions contacts with each of the two disks, between which it is situatedon a radial line, whichI will hereinafter refer to as a "line of Contact, each of said lines of contact extend- Specicaton of Letters Patent. y n Application leii May 8, 1903. Serial No. 156,182.

lThe pump has a plurality of successively-arranged compartments Patented Dec. 5, 1905.

` ling from-,the center of the inclined disk to its periphery. The transverse partitions and the inclined. disks have a rotary movement relative to each other, which may be accomplished .by holding the partitions stationary and rotating the'inclined disks or holding said disks stationary and rotating the partitions. either kevent the lines of contact between thev transverse partitions and inclined disks are advancing overthe'face ofthe former, and since the longitudinal partitions are held from rotary movement with respect to the transverse partitions the lines of contact between said longitudinal partitions and inclined disks are. advancing overthe face of the latter. The sides of each of rsaid compartments or pockets meet on two of said lines of; contact which are moving relatively to each other, andso long as the pump is in operation, therefore, the compartments are constantly varying insize- The pockets on oneside of the longitudinal partition areconnected byl suitable ports with pockets on the opposite side of said partition. During the operation of the pump the first pocket is brought into register with the inlet-port of the pump and becomesA lled with material. The continued M After the charge of material has been forced into the second compartment it is locked therein Vby the closing of the port, and then the material forced forward into the next compartment, this operation being continued until the material is finally forced out of the in-` let of the pump.

My invention` can'better be explained byreference to the accompanying drawings, in whichf p i Figure lis an elevation ofvv my improved pump, part of the pump beingbrokenout to better show the construction. fFig. 2 is a section on the line w m, Fig. 1. ,Fig. 3 is a part plan view and part-sectional view'on the line y 2y, Fig. 1. Figll: is a horizontal section on the line e e, Fig. 1. Fig. 5 is a vertical section through one inclined disk and the two adjacent straightadisks. a Fig. 6 is a side view l size of said compartment is reduced and said of one of the inclined disks. Fig.` 7 is a detail of the sliding block or longitudinal partition. Fig. 8 is a view similar to Fig. 1, showing a modified form of the invention. Fig. 9 is a section on the line b, Fig. 8. Fig. 1() is a top'plan view of one end of the pump Shown in Fig. 8. Fig. 11 is a section on the line c o, Fig. 9. Fig. 12 is a perspective view of the form of straight-faced disk employed in Fig, 8. Fig. 13 is a perspective view of one of the inclined disks. Fig. 14 is a section through the upper part of the casing on the line m m, Fig. 1, and showing part of the port 27. Fig. 15 is a similar section on the line p p, and Fig. 16 shows one of the inclined disks in the form of the invention illustrated in Fig. 11.

The casing of the pump is designated by 3 and is provided with the cylindrical bore 4, in

longitudinal partitions 10.

which the elements of the pump operate.

I have shown herein a double pump-that is, one which takes material at each end and gradually displaces said material toward the center-this form of pump being preferred because it neutralizes the inevitable end thrust incident to a rotary pump through which the material being pumped passes in one direction only.

The casing is provided with a suitable suction-chamber 5, to which the material passes through the inlet 6. At each end of the suction-chamber is an inlet-port 7, leading into the cylindrical bore.

The pumping elements comprise a plurality of inclined or camfaced disks 8, a plurality of transverse partitions 9, and a plurality of The transverse partitions 9 alternate with the inclined or eamfaced disks 8 and in this embodiment of the invention are shown in the form of straightfaced disks-that is, disks having their faces at right angles to the agis of the cylindrical bore. Each of the straight disks 9 has a slot 12, in which is received one of the longitudinal partitions in the form of a block 10, said partitions each being of such a length as to fill the space between two adjacent inclined disks 8 and being slidably mounted in the slot of the corresponding straight-faced disk. The ends of the blocks 10 stand at right angles to the axis of the cylindrical bore and are therefore parallel to the faces of the straight disks 9, and to make water-tight joints between the inclined disks and the straight disks and blocks 10 I have made said inclined disks in such a way that any radial section will show the sides of the disk square or at right angles to the axis of rotation, as best seen in Fig. 5. With this construction there is a radial line of contact 18 between each end of eachblock 10 and the corresponding camface of an inclined disk and another radial line of contact 11 between each face of each straight disk and the corresponding' cam-face of the inclined disk.

In the embodiment of my invention shown in Figs. 1 to 7 the inclined disks 8 are keyed to a suitable shaft 13, which is mounted in bearings 14 in the heads 15 o'f the casing, while the straight disks 9 are held stationary in any suitable way, as by means of screws 16, extending through the side of the casing andinto said disks. Theinclined disks areillustrated in Fig. 5 as having the hubs 17, which project into and form bearings for the stationary straight disks 9. In this embodiment of my invention the sliding' blocks 10 are all inline with one another, while the inclined disks are arranged with an angular advance between successive disks, as best seen from Fig. 4. I prefer this arrangement for reasons which will be hereinafter more fully set forth.

The parts as thus far described are duplicated at each end of the pump, and in the center is a double inclined disk 8, the two faces of which angle in opposite directions. At each end of the casing is a half-inclined disk 8]', one face of which is square and abuts against the head 15, and the other face of which has the peculiar construction of cam-face above described and engages the end block 10.

I have herein used the term line of contact to indicate the contacting surfaces of the inclined or cam -faced disks with the straight disks and with the sliding blocks 10, because theoretically these elements would contact in a line only. In actual practice, however, the surface of contact between these elements becomes approxinlately sectorshaped, both because the angle of inclination between the straight and inclined disks is so small and because after some use the contacting surfaces become iiattened somewhat by wear. In actual practice, therefore, there is sector-shaped interference or contact between each straight and inclined disk.

rIhe port 7 has a length equal to the space occupied by one straight and one inclined disk plus the rake or lead of the end disk 8" and a width circumferentially equal to the amount of the angular interference or contact of a straight and an inclined disk plus such an amount of lead as may be found necessary or desirable.

From the above and with the parts shown in Fig. 1 it will be observed that the space 21 communicates with the suction-chamber through the port7 and is therefore lilled with the material to be pumped. lf now the shaft is rotated in the direction of the arrow (t, Fig. 14, the line of contact 11 for the compartment 21 moves over the face 22 of the disk 9, and when said line of contact crosses the port 7 the material which has entered the space 21 is locked therein and confined between the disks 8 and 9 and the two lines of contact 11 and 18. tating the line of contact 11 approaches 1S and the compartment 21 is continuously decreasing in size. This decrease in size of the compartment forces the material therein out ICO- IIO

As the disk continues rothrough the port 27, which, it will be ob-' served, Fig. 14, communicates with said com-r vstraight and inclined disks on the other side of the partition 10. Fig.'3 gives the shape of this port. The material, therefore, in the comlpartment 21 isforced through the port 27 intoa corresponding compartment 21 farther on. It will be noted that the inclined disk bounding the compartment 21a is set in advance of they inclined disk bounding compartment 21, the angle of advance being .substantially theangular `distance between the receiving and discharge ends of the port 27, whereby the lines of contact 11 for said two disks cross vthe ends of said ports substantially simultaneously.' Assoon as the line of contact for the second disk 8 has crossed the discharge end of port '27 the charge of material which has been forced into compartment 21a becomes locked therein, and at the same time an outlet-port 32, leading into the outlet-chamber 30, is brought into register with vthe4 compartment 21, and

the material in said compartment is forced by the advancing line of, contact port and discharged.

The material which is locked into the chamber by the rotation of the disk 8 is forced by the approaching of the line of' contact 11 to the linej 18 through a port 19', which leads through the body of the pump, into a corree spending compartment or chamber 20xat the l forward compartment to one in the rear.

opposite side of the partition and from this latter compartment through an outlet-port 31 vinto the outlet-chamber 30. During the vrotation of the cam-faced'disks the longitudinalpartitionsv 10 are reciprocated back and forth by reason of the cam shape of the faces ofthe inclined or cam-faced disk, the faces of the disks 8 acting as camsto give the vpartitions 10 their reciprocating movement.

cam-faced disks. y

From the above it will be seen that all the rotary pumping elements are arranged axially and can be operated by a' single shaft and' 'that each charge of material is positively l a high-duty pump and to pump against almost any pressure, something which has not been possible with any rotary pump heretofore in whichthe elements are mounted on a single shaft, so far as Iam aware.

In the embodiment of the inventionshown in Fig.'= 1 I have shown only two sets of disks,

andby the term-set I mean one straight and one inclined disk, and therefore the material is takenl from the compartments 2,0 vorl 11 through said y keyed to' the shaft.

Because of this operation I have described these disks 8 as 21, forced through the ports y27 or 19 into the corresponding compartments between the two disks of ,the second set, and from there forced through the ports 32 and 31 into the outletvchamber 30. It will be understood, however, 70

that any number of sets of disks may be employed and also that the greater the number the greater the head against which the pump will operate. v

It is essential, of course, that the contact betweenthe blocks l0 and the disks 8 be such as to prevent any leakage of water by thepartition 10 or by the lines of contact 18, and I may, if desired, therefore make the blocks adjustable,

as shown in Fig.' 5, so that any wear which 8O i i' 4o'r slightly rounding, so that they will bear squarely against the faces of the inclined disks at every point of the rotation of the latter.

In the above embodiment of my invention'I .have described the disks'8 as rotary and the disks 9 as non-rotary. In Figs. 8 to 11 I have yillustrated a form of the invention in which the reverse is truethat is, the inclined disks are held from rotation bythe screws 16 as seen'in Fig. 11, and the straight disks 9 are I have also showneachv straight disk as having two diametrically 100 opposite recesses 12, in each of which oper;- ates a block l10. rIhe arrangement of ports in this formof my invention is slightly different from that vshown in Fig. 1. 1 Each disk 8 has extending transversely through it a port 40, T05 vand the body of the casing has ports 41, which lead fromtone space to the next succeeding space. IIn this f orm of my invention as the straight'disks are revolved each block 10 of the end disk 9 locks in a quantity of material IIO into onel of the compartments between the disks as said block passes across the port 7.

Since the inclined disks are stationary, the line of contact 1l between the straight and inclined disks is at the upper side of the casing, I I5 and as the blocks 10 approach said line of contact the material is forced through the port 41 into the compartment at'the opposite sidey of thedisk 9. During the further continued. rotation this material is forced through the port 4() in the inclined disk to the left-hand side, of said disk, Fig. 8,'and from there through the next port L11to the left-hand side of the'next disk 9 and then throughthe port 40 in the next disk 8 to the opposite side of said 125 disk. In this form of my invention a single column of material only is being displacedand carried first from one side of each disk to thev f opposite ,side of said disk, and thus continually advancing toward the outlet-chamber 30.

In the form of the invention shown in Figs. 1 to 7 two separate columns of material are being advanced from each inlet-port 7 to the outlet-chamber 30, thus making four columns which are being discharged into said outletchamber. Each column is fed forward intermittingly; but the relation of the ports is such that the intermittent movement of the columns follow each other in succession, thus avoiding any shock or jar.

Since the construction is such that each compartment is positively closed from communication with the preceding compartment and the material in said compartment forced forward into a succeeding compartment, which also becomes positively closed` it follows that there will be no appreciable leakage from one compartment back into the preceding one. This being so, my improved pump will create a suction in the suction-chamber 5 sufficient to lift water approximately as high as any ordinary suction-pump will. This is another point wherein my rotary pump differs from any other rotary pumps having a single shaft of which I am now aware, for if air be admitted to the runner of other rotary pumps of this type the pump becomes what is known as air-bound and will cease to force water forward. IVith my improved pump any air which is admitted to the suction-chamber 5 is positively forced forward through the various compartments the same as any other material, and a vacuum is soon established sufficient to lift the water.

In the embodiment of the invention shown in Fig. l, wherein the inclined or cam-faced disks 8 rotate, said disks might be termed the Limpellers, since it is by their movement that the water is impelled or forced through from one compartment to another. In the embodiment of my invention illustrated in Fig. l1, however, where the inclined disks are stationary the rotary disks would be regarded as the impellers.

Although I have described two ways that my invention may be embodied, I do not wish to be limited to the exact construction shown, as various changes may be made in the constructional details of the parts without departing in any way from the invention expressed in the appended claims.

Having described my invention, what I claim, and desire to secure by Letters Patent, 1s-

1. In a rotary pump, a single shaft having thereon a plurality of pumping elements forming between them successively-arranged compartments which are connected by ports, and means to rotate said shaft whereby the material in the first compartment is positively forced into the next succeeding compartment and locked therein, and then vsubsequently forced positively from said second compartment into the next succeeding compartment and locked therein. i

2. In a rotary pump, a plurality of pumping elements forming between them succes- I sively-arranged compartments which are connected by ports, a portion of said elements being constructed to rotate, means to rotate all the rotary elements about a common axis, such rotation decreasing the size of any one compartment and simultaneouslyincreasing the size of the next succeeding compartment, whereby the material in any compartment is positively forced forward into the next compartment, and means for positively locking the material in any compartment after it has been forced thereinto.

3. In a rotary pump, a casing having a cylindrical bore, a plurality of inclined disks in said bore, transverse and longitudinal partitions separating said disks, said partitions dividing the spaces between the disks into compartments which are connected by ports, and means to rotate the disks relative to the partitions, whereby the size of the compartments is constantly changing and material is positively forced from one compartment to the next succeeding, the arrangement of ports and disks being such that the material which is forced into any compartment is locked therein, and subsequently positively forced from said compartment into the next forward compartment.

4. In a rotary pump, a casing having a cylindrical bore, a plurality of alternately-arranged straight and inclined disks operating in said bore, each inclined disk contacting with each of the adjacent straight disks in a line of contact, whereby compartments are formed between the disks, ports connecting said compartments, and means to give a relative rotary movement between the straight and inclined disks.

5. In a rotary pump, a casing having' a cylindrical bore, a set of inclined disks in said bore, a corresponding set of straight disks in said bore, the straight disks alternating with the inclined ones, whereby a compartment exists between each two adjacent disks, means to rotate the disks of one set relative to those of the other, and ports connecting the compartments.

6. In a rotary pump, a casing having a cylindrical bore, a plurality of disks in said bore, each being inclined to the axis of said bore, a longitudinal and a transverse partition between each two adjacent disks, said partitions contacting with the disks and dividing the space between each two disks into compartments which are connected by ports, and means to rotate the disks relative to the partitions, whereby the size of the compartments is constantly changing and material is positively forced from one compartment to another.

7. In a rotary pump, a casing having a cylindrical bore, a plurality of inclined disks in said bore, a longitudinal and transverse partition between each two adjacent disks and di- IOO IIS

' viding the space between said disks into compartments, and means to give the disks a ro- Y I tary movement relative to thepartitions, each compartment on one side of the longitudinal partition being connected to a compartment on the other side. ofl the partition.

8. .In a rotary pump, a casing having a cylindrical bore, a series of inclineddisks operating in said bore, each of said disks'bein'g so constructed that every radial line on the face thereof stands at right angles to 4the axis of the bore, straight-faced disks alternating with the inclined disks, and a block mounted in .each straight-faced diskv for movement paral- J oHN C. EDWARDS.

vlelj to the axis, each vblock contacting at itsl 

